Emergency cut-off valve for liquefied petroleum gas cylinder

Abstract

The utility model provides a kind of liquefied petroleum gas cylinder emergency cut-off valve, belong to valve technical field.It solves the traditional liquefied petroleum gas cylinder emergency cut-off valve, valve rod part relies on sealing ring and dynamic sealing structure, easy to appear gas leakage and long time inaction jam risk, and existing liquefied petroleum gas cylinder emergency cut-off valve does not have overflow cut-off function problem.This liquefied petroleum gas cylinder emergency cut-off valve, including valve body assembly and hand wheel assembly, valve body assembly and hand wheel assembly are connected by thread, valve body assembly has the upper port and lower port of vertical distribution setting, upper port is connected with reset unit by thread, lower port is connected with electromagnetic unit by thread, valve body assembly is provided with valve seat unit, and the valve seat unit, reset unit and electromagnetic unit three are on the same center line.The utility model has the advantages of emergency cut-off and overflow cut-off.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, and relates to an emergency shut-off valve, particularly an emergency shut-off valve for liquefied petroleum gas cylinders. Background Technology

[0002] An emergency shut-off valve is a safety device that can quickly close in emergency situations (such as fire, leakage, pipeline rupture, etc.) to prevent the large-scale release of hazardous materials into the environment. It is widely used in liquefied petroleum gas, natural gas, hazardous chemical storage tanks, storage and transportation equipment, and pipelines, and is a crucial piece of equipment for ensuring production safety.

[0003] Traditional emergency shut-off valves for liquefied petroleum gas cylinders rely on sealing rings and dynamic sealing structures for the valve stem, which are prone to leakage and jamming due to prolonged inactivity. Furthermore, existing emergency shut-off valves for liquefied petroleum gas cylinders do not have overcurrent shut-off functionality. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by providing an emergency shut-off valve for liquefied petroleum gas cylinders.

[0005] The objective of this utility model can be achieved through the following technical solution: an emergency shut-off valve for liquefied petroleum gas cylinders, characterized in that it includes a valve body assembly and a handwheel assembly, the valve body assembly and the handwheel assembly are connected by threads, the valve body assembly has an upper port and a lower port arranged vertically, the upper port is connected to a reset unit by threads, the lower port is connected to an electromagnetic unit by threads, the valve body assembly is provided with a valve seat unit, and the valve seat unit, the reset unit and the electromagnetic unit are all located on the same center line.

[0006] In the aforementioned emergency shut-off valve for liquefied petroleum gas cylinders, the valve seat unit comprises a valve seat having an inlet and an outlet. A fixed plate with a central through-hole is disposed within the valve seat. A plastic sealing frame is installed at the bottom of the fixed plate. The plastic sealing frame is composed of multiple independent supports, each of which forms an opening at the bottom of the through-hole in the fixed plate. A steel ball is installed within this opening to seal the through-hole in the fixed plate. A sealing gasket with a central through-hole is disposed between the fixed plate and the plastic sealing frame.

[0007] In the aforementioned emergency shut-off valve for liquefied petroleum gas cylinders, the electromagnetic unit is equipped with an electromagnetic base connected to the valve body assembly. The electromagnetic base has an internal movable channel containing a moving iron core. The top of the moving iron core has a push rod for pushing a steel ball, and the bottom of the moving iron core has an installation groove containing a spring. A stationary iron core is located at the bottom of the spring. A magnet is installed at the bottom of the movable channel. The stationary iron core and the magnet abut against each other, and the magnet attracts the moving iron core, thus fixing it in place. The outer wall of the electromagnetic base is equipped with a frame, a coil, a coil encapsulation body, and a coil shell. The coil encapsulation body is used to encapsulate and protect the coil. One end of the coil encapsulation body has an outlet for installing a cable, allowing the cable to be installed and powering the coil. The bottom of the electromagnetic base has a nut for fixing the coil shell.

[0008] In the aforementioned emergency shut-off valve for liquefied petroleum gas cylinders, the reset unit is equipped with a reset seat connected to the valve body assembly. The reset seat contains a reset pin for pushing a steel ball. The reset pin's function is to push the steel ball to achieve the reset operation of opening the relevant components of the valve body. The reset seat has a limiting washer with a through hole. The reset pin is sleeved on the limiting washer and extends outward. A reset spring is sleeved above the reset pin on the limiting plate. The reset spring provides elastic restoring force for the reset pin's reset action. A reset cap is threaded to the top of the reset spring. Pressing the reset cap causes the reset rod to push the steel ball downward.

[0009] In the aforementioned emergency shut-off valve for liquefied petroleum gas cylinders, a first sealing ring for sealing and preventing leakage is sleeved between the electromagnetic seat and the valve body assembly; a second sealing ring for sealing and preventing leakage is sleeved between the reset seat and the valve body assembly; and a double-layer sealing ring for sealing is sleeved between the valve seat and the valve body assembly.

[0010] In the aforementioned emergency shut-off valve for liquefied petroleum gas cylinders, one end of the valve body assembly is provided with a gas outlet for connecting to a pipeline.

[0011] Working principle: When the valve body is in normal condition, pressing the reset cap of the reset unit moves the reset pin downwards. The reset pin pushes the steel ball blocking the through hole of the fixed plate, which slides downwards to open the through hole, allowing gas to flow normally. The steel ball slides downwards and abuts against the push rod of the moving iron core, causing the moving iron core to move downwards. Under the attraction of the magnet, the magnet generates an attraction force on the stationary iron core, fixing the stationary iron core at the bottom of the moving channel. The moving iron core is connected to the stationary iron core by a spring, and the moving iron core also remains fixed. In case of an emergency requiring the gas supply to be cut off, the coil is powered by a cable. After the coil is energized, it generates a magnetic field. This magnetic field interacts with the magnetic field of the magnet, changing the attraction force of the magnet on the moving iron core. Under the elastic force of the spring, the moving iron core begins to move upwards. The push rod at its top moves upwards and pushes the steel ball upwards to the fixed plate to block the through hole, cutting off the flow channel, thereby achieving the purpose of emergency cut-off of liquefied petroleum gas supply.

[0012] Compared with existing technologies, this liquefied petroleum gas cylinder emergency shut-off valve, through an electromagnetic unit, can quickly generate a magnetic field after being energized, causing the moving iron core to move rapidly and push the steel ball to cut off the gas passage. It has a short response time and meets the requirements of a shut-off valve device under high pressure, enabling timely cut-off of the gas source in emergencies, realizing the valve body's emergency shut-off function, and reducing the risk of valve stem jamming. The moving iron core does not need to cooperate with the sealing ring, eliminating the risk of gas leakage in the overall structure. The stainless steel ball and sealing gasket provide a better sealing effect. When the hose at the rear of the shut-off valve detaches, causing overflow, the internally installed steel ball will move towards the through hole under the driving force of the gas, thus achieving the function of cutting off the overflow. Attached Figure Description

[0013] Figure 1 This is a 3D diagram of the emergency shut-off valve of a liquefied petroleum gas cylinder.

[0014] Figure 2 This is a cross-sectional view of the emergency shut-off valve of this liquefied petroleum gas cylinder.

[0015] In the diagram, 1. Valve body assembly; 2. Handwheel assembly; 3. Upper port; 4. Lower port; 5. Reset unit; 6. Electromagnetic unit; 7. Valve seat unit; 8. Valve seat; 9. Fixing plate; 10. Plastic sealing frame; 11. Bracket; 12. Steel ball; 13. Electromagnetic seat; 14. Moving iron core; 15. Push rod; 16. Spring; 17. Stationary iron core; 18. Magnet; 19. Frame; 20. Coil; 21. Coil encapsulation body; 22. Coil shell; 23. Outlet; 24. Reset seat; 25. Reset pin; 26. Limiting washer; 27. Reset spring; 28. Reset cap; 29. ​​Sealing ring one; 30. Sealing ring two; 31. Double-layer sealing ring; 32. Air outlet. Detailed Implementation

[0016] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0017] like Figure 1 , Figure 2 As shown, this liquefied petroleum gas cylinder emergency shut-off valve includes a valve body assembly 1 and a handwheel assembly 2, which are connected by threads. The valve body assembly 1 has an upper port 3 and a lower port 4 arranged vertically. The upper port 3 is connected to a reset unit 5 by threads, and the lower port 4 is connected to an electromagnetic unit 6 by threads. A valve seat unit 7 is provided inside the valve body assembly 1, and the valve seat unit 7, the reset unit 5, and the electromagnetic unit 6 are all located on the same center line.

[0018] To elaborate further, the valve seat unit 7 is composed of a valve seat 8 having an air inlet and an air outlet. A fixing plate 9 with a through hole in the center is provided inside the valve seat 8. A plastic sealing frame 10 is installed at the bottom of the fixing plate 9. The plastic sealing frame 10 is composed of multiple independent brackets 11. Each bracket 11 surrounds the bottom of the through hole of the fixing plate 9 to form an opening, and a steel ball 12 is installed in the opening to seal the through hole of the fixing plate 9. A sealing gasket with a central through hole is provided between the fixing plate 9 and the plastic sealing frame 10.

[0019] To elaborate further, the electromagnetic unit 6 is equipped with an electromagnetic base 13 connected to the valve body assembly 1. The electromagnetic base 13 has an internal movable channel, within which a moving iron core 14 is installed. The top of the moving iron core 14 has a push rod 15 for pushing the steel ball 12. The bottom of the moving iron core 14 has a mounting groove containing a spring 16. A stationary iron core 17 is located at the bottom of the spring 16. A magnet 18 is installed at the bottom of the movable channel. The stationary iron core 17 and the magnet 18 abut against each other, and the magnet 18 exerts force on the moving iron core 14. The electromagnetic base 13 generates an adsorption force, thereby fixing the moving iron core 14. The outer wall of the electromagnetic base 13 is provided with a frame 19, a coil 20, a coil encapsulation body 21, and a coil shell 22. The coil encapsulation body 21 is used to encapsulate and protect the coil 20. One end of the coil encapsulation body 21 is provided with a cable outlet 23 for installing cables. Cables can be installed through the cable outlet 23 and power is supplied to the coil 20. The bottom of the electromagnetic base 13 is provided with a nut for fixing the coil shell 22. The coil shell 22 is fixed by the nut.

[0020] To elaborate further, the reset unit 5 is equipped with a reset seat 24 connected to the valve body assembly 1. The reset seat 24 contains a reset pin 25 for pushing the steel ball 12. The reset pin 25 pushes the steel ball 12 to achieve the reset operation of opening the valve body related components. The reset seat 24 has a limiting gasket 26 with a through hole. The reset pin 25 is sleeved on the limiting gasket 26 and extends outward. The reset pin 25 is located above the limiting plate and is fitted with a reset spring 27. The reset spring 27 provides elastic restoring force for the reset action of the reset pin 25. The top of the reset spring 27 is connected to a reset cap 28 by a thread. By pressing the reset cap 28, the reset rod 15 pushes the steel ball 12 downward. When the reset cap 28 is released, the reset spring 27 provides elastic force to move the reset pin 25 upward to reset.

[0021] To elaborate further, a sealing ring 29 for sealing and preventing leakage is fitted between the electromagnetic base 13 and the valve body assembly 1, a sealing ring 30 for sealing and preventing leakage is fitted between the reset base 24 and the valve body assembly 1, and a double-layer sealing ring 31 for sealing is fitted between the valve seat 8 and the valve body assembly 1.

[0022] To elaborate further, one end of the valve body assembly 1 is provided with an air outlet 32 ​​for connecting to a pipeline.

[0023] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0024] Although this document frequently uses terms such as valve body assembly 1, handwheel assembly 2, upper port 3, lower port 4, reset unit 5, electromagnetic unit 6, valve seat unit 7, valve seat 8, fixing plate 9, plastic sealing frame 10, bracket 11, steel ball 12, electromagnetic seat 13, moving iron core 14, push rod 15, spring 16, stationary iron core 17, magnet 18, frame 19, coil 20, coil encapsulation body 21, coil shell 22, wire outlet 23, reset seat 24, reset pin 25, limit washer 26, reset spring 27, reset cap 28, sealing ring one 29, sealing ring two 30, double-layer sealing ring 31, and air outlet 32, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. An emergency shut-off valve for liquefied petroleum gas cylinders, characterized in that, The device includes a valve body assembly (1) and a handwheel assembly (2), which are connected by threads. The valve body assembly (1) has an upper port (3) and a lower port (4) arranged vertically. The upper port (3) is connected to a reset unit (5) by threads, and the lower port (4) is connected to an electromagnetic unit (6) by threads. The valve body assembly (1) contains a valve seat (8) unit (7), and the valve seat (8) unit (7), the reset unit (5), and the electromagnetic unit (6) are all located on the same center line.

2. The emergency shut-off valve for a liquefied petroleum gas cylinder according to claim 1, characterized in that, The valve seat (8) unit (7) is composed of a valve seat (8) with an air inlet and an air outlet. A fixing plate (9) with a through hole in the center is provided inside the valve seat (8). A plastic sealing frame (10) is installed at the bottom of the fixing plate (9). The plastic sealing frame (10) is composed of multiple independent brackets (11). Each bracket (11) forms an opening at the bottom of the through hole of the fixing plate (9). A steel ball (12) for sealing the through hole of the fixing plate (9) is installed in the opening. A sealing gasket with a central through hole is provided between the fixing plate (9) and the plastic sealing frame (10).

3. The emergency shut-off valve for a liquefied petroleum gas cylinder according to claim 1, characterized in that, The electromagnetic unit (6) is provided with an electromagnetic seat (13) connected to the valve body assembly (1). The electromagnetic seat (13) has an open movable channel inside. The movable channel is provided with a moving iron core (14). The top of the moving iron core (14) has a push rod (15) for pushing the steel ball (12). The bottom of the moving iron core (14) has an installation groove. The installation groove is provided with a spring (16). The bottom of the spring (16) is provided with a stationary iron core (17). The bottom of the movable channel is provided with a magnet (18). The stationary iron core (17) and the magnet (18) abut together. The outer wall of the electromagnetic seat (13) is provided with a skeleton (19), a coil (20), a coil encapsulation body (21), and a coil shell (22). One end of the coil encapsulation body (21) is provided with an outlet (23) for installing a cable. The bottom of the electromagnetic seat (13) is provided with a nut for fixing the coil shell (22).

4. The emergency shut-off valve for a liquefied petroleum gas cylinder according to claim 3, characterized in that, The reset unit (5) is provided with a reset seat (24) connected to the valve body assembly (1). The reset seat (24) is provided with a reset pin (25) for pushing the steel ball (12). The reset seat (24) has a limiting pad (26) with a through hole. The reset pin (25) is sleeved on the limiting pad (26) and extends outward. The reset pin (25) is located above the limiting plate and is fitted with a reset spring (27). The top of the reset spring (27) is connected to a reset cap (28) by a thread. By pressing the reset cap (28), the reset rod (15) pushes the steel ball (12) downward.

5. An emergency shut-off valve for liquefied petroleum gas cylinders according to claim 4, characterized in that, A sealing ring 1 (29) for sealing and preventing leakage is provided between the electromagnetic seat (13) and the valve body assembly (1), a sealing ring 2 (30) for sealing and preventing leakage is provided between the reset seat (24) and the valve body assembly (1), and a double-layer sealing ring (31) for sealing is provided between the valve seat (8) and the valve body assembly (1).

6. The emergency shut-off valve for a liquefied petroleum gas cylinder according to claim 1, characterized in that, One end of the valve body assembly (1) is provided with an air outlet (32) for connecting to a pipeline.

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